<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
        <div>
          <img src="../assets/heima.png" alt="">
          <span>电商后台管理系统</span>
        </div>
        <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px': '200px' ">
          <div class="toggle-botton" @click="toggleCollapse"> ||| </div>
          <!-- 侧边栏菜单区域 -->
        <el-menu  background-color="#333744" text-color="#fff" active-text-color="#409eff" :unique-opened='true' :collapse='isCollapse'
        :collapse-transition="false" :router='true' :default-active= 'activePath'>
            <!-- 一级菜单 -->
        <el-submenu :index="item.id + ''" v-for= "item in menulist" :key="item.id">
             <!-- 一级菜单的模板区域 -->
        <template slot="title">
           <!-- 图标 -->
          <i :class="iconObject[item.id]"></i>
          <!-- 文本 -->
          <span>{{ item.authName }}</span>
        </template>
        <!-- 二级菜单 -->
        <el-menu-item :index=" '/'+subItem.path " v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)">
            <template slot="title">
           <!-- 图标 -->
          <i class="el-icon-menu"></i>
          <!-- 文本 -->
          <span>{{ subItem.authName }}</span>
        </template>
        </el-menu-item>
        </el-submenu>
    </el-menu>
      </el-aside>
      <!-- 右侧 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      menulist: [],
      iconObject: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      // 是否折叠
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    //  获取所以的菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
      console.log(res)
    },
    // 点击按钮，折叠展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    //  保存链接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
    }
  }
}
</script>

<style lang="less" scoped>
.home-container {
    height: 100%;
}
.el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    >div {
        display: flex;
        align-items: center;
        span {
            margin-left: 15px;
        }
    }
}
.el-aside {
    background-color: #333744;
    .el-menu {
        border-right: none;
    }
}
.el-main {
    background-color: #EAEDF1;
}
.iconfont {
    margin-right: 10px;
}
.toggle-botton {
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>
